class Rectangle:
  @staticmethod
  def calArea(a, b):
    '''
    计算面积
    :param a: 长
    :param b: 宽
    :return:
    '''
    return a * b

  @staticmethod
  def calCircu(a, b):
    '''
    计算周长
    :param a: 长
    :param b: 宽
    :return:
    '''
    return 2 * (a + b)

area1 = Rectangle.calArea(3, 4)
area2 = Rectangle.calArea(6, 7)
print(area1)
print(area2)
circu1 = Rectangle.calCircu(2, 2)
circu2 = Rectangle.calCircu(8, 3)
print(circu1)
print(circu2)
